Book



March 4, 1941.

c. MCKAY BOOK Filed March 10, 1938 'Efig? m gia 6333363 INVENTOR 7W% x, m 4% Patented Mar. 4, 1941 UNITED STATES PATENT OFFICE Application March 10,

2 Claims.

My invention relates to a new type of bound book in which the sheets or leaves are perforated along one edge and held together by a plurality of loops extending through said perforations.

The chief object of my invention is the pro duction of a bound book, the sheets of which will lie substantially flat when the book is opened at any point.

Other objects will appear from the following description, reference being made to the accompanying drawing in which:

Figure 1 is a cross section of an assembly of sheets perforated preparatory to binding them together.

Figure 2 is a similar cross section with a piece of wire inserted through a line of the perforations.

Figure 3 is a similar View with the section of wire partly formed into a loop and a strip of binders cloth placed over the ends of the wire.

Figure 4 shows the construction after the wire has been bent down over the binders cloth.

Figure 5 shows the same structure with a strip of binders board pressed against the wire and glued to the strip of binders cloth.

Figure 6 is a plan View of a portion of the bound sheets.

Figure 7 is an end view, partly in section, of.

the bound book.

Figure 8 is a similar view of the bound book when open.

Figure 9 is a plan View of a perforated strip adapted to be used in replacing pages which have been torn out.

Figure 10 is a plan view of the same perforated strip pasted to a sheet.

Briefly stated, the method provided by this invention consists in perforating the sheets to be bound along one margin thereof, the perforations in all the sheets being the same and being equally spaced, feeding strands of wire through the registered perforations, forming the lengths of wire into loops, placing a strip of binders cloth over the ends of said wires, bending the wires down over said binders cloth, and glueing a strip of binders board to the binders cloth.

Although it is usually preferable to make the loops of wire and to fasten them between a strip of binders cloth and a strip of binders board, it is evident that any material capable of being formed in a loop and retaining its loop shape may be substituted for the Wire and that such loops may be glued, cemented or otherwise fastened to binding strips of other materials.

Referring to Figures 1-5, sheets I are perfo- 1938, Serial No. 195,068

rated as shown at 2 and stacked to register the perforations, wire 3 is inserted through each set of perforations and is formed into a loop as shown in Figure 3. In making this loop, I have found that the character and uniformity of the loops is improved if the sheets of paper are compressed so that the interior walls of the holes formed by the registered perforations are substantially rigid. A strip of binders cloth 4 next is forced over the ends of the wire loops 3 and the ends of these wire loops then are bent down over the binders cloth 4 as shown in Figure 4. I prefer to bend the extreme free ends of the wires outwardly to form short prongs 5. Although these prongs are not necessary, they will improve the rigidity of the loops when the book is completed. A strip of binders board 6 is then glued to the binders cloth 4 and the prongs 5, together with a substantial part of the fiat side of the wire loops 3, are pressed down into the binders board. When all the perforations 2 have been provided with wire loops attached to the binders board, as shown in Figure 6, the book may be provided with a cover secured in the conventional manner to the assembly just described as shown in Figure 7, the marginal portions of binders 1 cloth 4 extending laterally at opposite sides of the wires being attached to the sides of the cover I. A reasonably satisfactory cover can be secured in place by merely glueing the back of the strip of binders board 6 to the cover, in which case the strip of binders cloth does not need to extend beyond the wire loops.

Figure 9 represents a strip of thin Celluloid 8 which has been perforated as shown at 9, the perforations corresponding to the wire loops 3. Lines Ill represent cuts in the Celluloid which will permit the insertion of the wire loops as shown in Figure 10. The use of this strip permits the insertion of a sheet after the book is bound. It is merely attached to the edge of sheet H as shown in Figure 10 and the wire loops then are forced into the perforations 9 through the cuts Ill. This strip maybe made of any material of suflicient stiffness and tensile strength to hold the sheet in the book after the strip has been out along lines I0.

Having thus described my invention, what I claim is:

1. A book comprising a plurality of sheets perforated, a plurality of loops of a material capable of holding its loop shape extending through the perforations of said sheets and. of such size and so shaped that the sheets will readily turn upon them, one side of each of said loops exof said perforations and the loops being formed tending over a strip of binders cloth, and a strip of binders board to which said cloth strip is adhesively fastened, said loops being pressed into the binders board and held in place by the vbinders cloth.

2. A book comprising a plurality of sheets perforated, a plurality of wire loops extending through the perforations of said sheets, the diameter of the wire being less than the diameter ROBERT C. MGKAY. I 

